Friday, 8 June 2007

Geography [[Weather and Climate]] 4.2

[[4.2 Why do seasonal variaty o f climates occur?]]
Equinox: 12 hours of daylight and 12 hours of darkness which occurs when the sun is directly above the equator.
Position of the Sun::
22nd December = Over Tropic of Capricorn = winter solstice
21st March = Over Equator = Vernal Equinox
21st June = Over Tropic of Cancer = Summer Solstice
23rd Spetmeber - Over Equator = Winter Equinox
The Tropicsheya: 231/3 N and 231/3 S
* Area inbetween the tropics of Cancer and Capricorn where at at least one occasion throughout the year the sun will be directly overhead.
* The closer the place to the tropic of cancer or capricorn, the closer together the times the sun is overhead.
- As the sun moved north, so do the pressure belts as they are due to the suns heating of the air
- sun moves through 47 degrees of latitude each year
Pressure belts move 5 degrees north and south of their central locations.
In June, the pressure belts have moved north
In December, the pressure belts have moved south
- The weather systems move with the pressure belts.

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